Hand duplicator



March 16 1926. 1,576,666

W. P. MASON HAND DUPLICATOR Filed Oct. 2, 1924 2l Sheets-She??l l ff 10f Se@ 37 39 27 26 Eig. Z 33 Z7 `|9NVENT0R sa Y Zilliamjyasan WITNESSES'3 l Q l ATTORNEY March 16,1926" 1,576,666 W. P. MASON HAND DUPLICATOBFiled Oct. 2, 1924 2 Sheets-Sheet 2 ATTO RNEY Patented Mar. v16, 1926.

UNHTED STATES WILLIAM PORTER MASON, OF NORFOLK, VRGINIA. i

HAND DUrLIcAToR.

Application filed October 2, 1924. 'SeralrNo 741,229.

To ZZ 't0/0m t may concern:

Be it known that I, 1V iLLLfiM P. Mason, a

citizen of thc United States, residing at Norfolk, in the county ofNorfolk and State of Virginia, have invented a new and useful HandDuplicator, of which vthc following is a specification.

rlhis invention relates to an improved hand duplicator of the type whichcomprises a stencil frame with an inking device therein, and providedwith means for receiving and holding a stencil sheet on which anydesired'description may be cut.

LThe general object of the present invention is to provide a device ofthis type which may be economically manufactured, which operates withthe greatest accuracy and fl liciency, and in which the assembly of thevarious parts, and the securementA of the stencil sheet thereto may beaccomplished in the most effective and expeditious manner.

. The present invention is of the same general type as that disclosed inan earlier apA plication, Serial No. 712,322, filed May 10, 1924, butembodies certain improvements thereover; The specific structure of theseimprovements and their advantages will be more fully explained in thefollowing de-`r tailed description taken in connection with theaccompanying drawings, which illustrate the invention in its preferredform.

In. the drawings:

Figure 1 is a perspective view of the invention.

Figure 2 is a plan view thereof, with certain parts broken away or shownin section. vFigure 3 is a vertical transverse section.

Figure 4 is a frame or holder detached.

Figure 5 is a perspective .view of the stencil frame detached.

Figure 6 is a perspective view of the inking pad.v

Figure `7 is a bottom plan view of a portion of the device. p

In the form herein shown, the invention includes a main frame or holder,preferably rectangularin shape, having vertical side walls 10 and 11,connected by end walls 12. A flange or ledge 13 extends inwardly fromthe bottom of the side and end walls, defining. a rectangular opening,through which projects the diaphragm 14. The latter is curveddownwardly, and is formed with vertical sides 15 with their upperportions bent perspective view of the main upon themselves, as shown inFigure 3, and terminating in laterally disposed flanges 16, which aretransversely curved or corrugated to fit over similarly shapedcorrugations or channels 17, formed in the side flanges 13 of the mainframe.

The ink holder, as shown in Figure 6,' comprises an inner layer of felt1S and an outerY facing offine cotton cloth 19 or the like, and a pad 20therebetween, the several layers being bound together by parallel rowsof stitching 2,1,.leaving a certain amount of slack in the outervlayers, so that the holder may be stretched over the convexlyvcurvedsurface of the diaphragm 14 without wrinkling. n The diaphragm isprovided with numerous perforations 22, through which the ink may beuniformly distributed to the holder. In attaching the ink holder, it isstretched across the under surface of the diaphragm 14, with its sideedges clamped betweenthe flanges 13 and 1 6, and extending between theouter edges of the flanges 16 and the side walls 1()v and 11, and beingrigidly held thereby.

vThe front wall 10 is somewhat higher than the 'rear wall 11, and isformed at its ends with notches 23, which receive the inwardly bentflanges 24 formed on the upper sides of the end walls 12, thus providinga guideway beneath said ilan'gesvand above the upper edges of the rearwall 11 and the diaphragm wall 15, for snugly receiving the top plate orcover 25.

lThe front wall 10 is formed near each end with an upwardly `projectinglug 26, with similar lugs 27 spaced fromfopposite sides'4 thereof, andadapted to receive a spring latch ,28 secured-to the upper side of thecover 25. Each of these vspring latches 28 projects beyond the frontedge of the cover v plate 25, and is `formed-with an eye 29 forreceiving the lug 26, the front end yof the latch being bent upwardlywith its cornersrounded, so as to be automatically guided into lockingposition as the cover is slid into i place. lnorder to remove the cover,the

ends of the latches 2S must be positively and forcibly lifted to releasethem from the lugs 26. Keepers 30 are preferably formed on the frontedOe of the cover late to orevent.

ioo

forming hinge'pins about whiclrthe stencil frameV is adapted to swing.This stencil frame, as shown in Figures 1 and 5, is of the same generalshape as the main frame, having a peripheral upstanding flange 33, whichfits around the main frame, and formed on its rear side with lugs 34,which, when the tlevice is assembled, are adapted to be bent about thehinge pins 32 to form a hinged connection between the stencil frame andmain frame. The stencil frame also has an inwardly disposed flange 35adapted to fit underneath the flange 1?, and provided with upwardlycurved corrugations or channels 36 adapted to register with thecorresponding corrugations or channels 17. The front side of the stencilframe is provided with upstan'ding spring latches 37, having inwardlyturned lips 38 adapted to engage over the upper edge of the front wall10 to lock the stencil frame in closed position. Each of these `latches37 is preferably provided with a corrugation 39 in order to stilfen thesame, but the latches and the sides of the stencil frame aresuiiiciently yieldable'to vpermit the latter to be unlatched and openedfor the purpose of changing the stencil, which is normally clampedbetween the side flanges S'of the stencil frame and the side flanges 13of the main frame. lt is preferred to secure rubber strips L10 to theunder sides of the `flanges 13, so that the stencil maybe more securelyheld.

It will be observed that the diaphragm is downwardly curved and projectsthrough the main frame and stencil frame, so that it may be rolled overthe surface to be printed by means of a suitable handle 41, which issecured `to the cover 25. The diaphragm is so designed that its side andend walls meetand rest firmly against the top and sides of the `mainframe, forming a solid foundation to receive the printing pressurewithout bending lor otherwise injuring the diaphragm. ln attaching theink holder, it is drawn over the surface of the diaphragm, and its edgesare drawn over the edges of the flanges 16 which clamp the same againstthe Walls '10 and 11 of the main frame, and as ythe diaphragmis forceddownwardly in the main'y frame, the side portions of the inlr helder aredrawn in and clamped between the corrugations or channels, which serveto draw the pad more tightly against the diaphragm, as well as to clampit more firmly.

The corrugations serve, therefore, not only to clamp the inliing padmore firmly in position but to stretch 'it tightly upon the diaphragm.They also serve to aline or center the several parts, and to properlylock them in working position.

The stencil sheet also is drawn tightly over the inking pad by means ofthe corrugations-as the stencil frame is closed, and held in workingposition by the spring catches 37. The rubberstripsl() also provideyielding surfaces against which the sides of the stencil sheet aresecurely held against slipping.

'lihe outer facing of the ink holder is of a quality suitable toproperly filter' or strain the ink, and also eliminates the grinding ofthe felt, into the stencil sheet, thus rendering it capable of producingcleaner work than where the felt or naked pad comes in contact with thestencil sheet.

lt will be noted that the stencil frame is constructed to lit closelywithin the main frame on all sides, and it is hinged so as to permit ofeasy opening in order -to insert the stencil sheet into printingposition. lllhen in position for printing, the stencil frame is heldtightly closed by means ofthe locking springs 37, while the cover plate25 is firmly held in position between the flanges 2st and the upperedges of the walls 15, and is secured against removal by means of thespring latches 28. The cover plate by engaging the vertical sides (Fig.holds the diaphragm down with theiflanges 16 in firm engagement with theledge 13 of the main frame.

While it is preferred to use the spring latches herein described forsecuring the cover plate within the main frame, it is quite obvious thatother means may be used similar to that disclosed in myearlieiapplication above referred to. lt will also ibc apparent that thevarious other features of the invention are capable of being modified invarious respects without departing from the spirit of the invention. Itis my intention, therefore, to include all such modifications within thescope of the appended claims.

Vvhat is claimed is:

1, ln a hand duplicator, the combination of a main frame having side anden'd walls and a flange projecting inwardly therefrom and defining anopening through the bottom of said frame, a diaphragm provided'with aflange arranged to -iit within said Walls and rest with it-s flange uponsaid inwardly projecting flange, said diaphragm having a downwardlyprojecting curved surface projecting through said opening, an inkingpad, unitary means for securing the diaphragm and pad to the main framewith the pad about the curved surface of said diaphragm, and means forsecuring a stencil frame and stencil sheet to the mainframe in positionfor stamping.

2. ln a hand duplicator, the combination of a main frame having side andend walls defining an opening through the bottom of said frame, adiaphragm having a downwardly projecting curved surface projectingthrough said opening, an inlring pad disposed about the curved surfaceof said A diaphragm, interiitting flanges on the frame and saiddiaphragm'to engage said pad, a stencil frame carrying a stencil sheet,and

means for securing the stencil frame to the main frame. v

3. In a hand duplicator, the combination of a main frame having side andend walls defining an opening through the bottom of said frame, adiaphragm having a downwardly projecting curved surface projectingthrough said opening, an inking pad disposed about said curved surface,means for securing said diaphragm and inlring pad in position, a stencilframe carrying a stencil sheet, and` means for securing the stencilframe to the main frame.v

4. In a hand duplicator, the combination of a main frame having a ledge,a diaphragm fitting within the frame and engaging the ledge, an inlringpad adapted to be stretched underneath the. diaphragm and also Aengagingthe ledge, a slidable cover engageahle with the diaphragm and slidablein the main frame to clamp the diaphragm and pad onto the ledge of saidframe, a handle secured to the cover, and means for securing a stencilframe and stencil sheet to the main frame in position for stamping.

5. The combination of a main frame having a ledge transverselycorrugated, a dia-V phragm fitting within the frame and having a flangeengaging the ledge and also transversely corrugated, an inlrmg padadapted to be stretched underneath the diaphragm and engaging the ledge,means for securing the diaphragm and pad to the frame and to hold theflange Vof the diaphragm in engagement with the ledge with the pad heldon the ledge by the flange, a stencil frame carrying a stencil sheet,and means for securing the stencil frame to the main frame in positionfor stamping.

`G. In a hand duplicator, the combination of a main frame having sideand end walls and a flange projecting inwardly therefrom and defining anopening through the bottom of said frame, a diaphragm provided with aflange arranged to fit within said walls and rest upon the inwardlyprojecting flange, said diaphragm having a downwardly curved surfaceprojecting through said opening, and means for clamping the diaphragm inposition and simultaneously securing an inlring pad therebeneath.

7. In a hand duplicator, the combination of a. main frame having sideand end walls and a flange projecting inwardly therefrom and defining anopening through the bottom of said frame, a diaphragm provided with aflange arranged to fit within said walls and rest upon the inwardlyprojecting flange, said diaphragm having a downwardly curved surfaceprojecting through .said opening and adapted to receive an inking pad,said end walls being extended upwardly and bent inwardly to formguideways, and a cover slidable in said guideways, said. diaphragmhaving upwardly projecting portions engageable by the cover to clamp thediaphragm and inlring pad in position.

8. In a hand duplicatonthe combination of a main frame, a diaphragmfitting within the main frame and having a curved operating surface, aninlring pad adapted to be'stretched over the curved operating surfaceand clamped between the diaphragm and main frame, a stencil frame hingedto the main frame and having a peripheral upstanding flange engagingabout the same, a stencil carried by the stencil frame and held aboutthe. pad, and locking means on the stencil frame engaging the main frameto hold the stencil in place. Y

9. In a hand duplicator, the combination of a main frame, a diaphragmfitting with-v in the frame, an inlring pad adapted to be stretchedunderneath the` diaphragm, and held in the main frame by the diaphragm,said main frame having inwardly turned flanges overhanging the diaphragmand forming guideways, a cover slidable in said guideways and engageablewith the diaphragm to clamp said diaphragm and inking pad to the mainframe, means for loclring the cover in clamping position, and means forsecuring a stencil frame and stencil'sheet in position for stamping.

10. In a hand duplicator, the combination of a main frame, a diaphragmfitting within the frame, an inking pad adapted to be` stretched acrossthe diaphragm and 4clamped between the sides of the latter and the mainframe., said main frame having inA- turned flanges overhanging thediaphragm, a cover slidable beneath said flanges and held thereby inposition to clamp the diaphragm and pad to the main frame, meansincluding a spring latch for automatically locking the cover in itsclamping position, a handle secured to the cover, a stencil frame hingedto the main frame, and means for locking the stencil frame andsimultaneously securing a stencil sheet underneath the surface of thepad. i

ll. In a. hand duplicator, the combination of a main frame having sideand end walls and a flange projecting inwardly therefrom, a diaphragmprovided with a peripheral fiange arranged'to fit within said walls, an

iuking pad adapted to be stretched beneath the diaphragm with its edgeportions engaged between said peripheral flange and the side walls, andmeans to secure. the diaphragm and main frame together with their sideflanges in clamping relation, said side flanges having registeringcorrugations which crimp the inking pad and stretch the same across theunder surface of the diaphragm.

12. In a hand duplicator, the combination of a main frame having sideand end walls and a flange projecting inwardly therefrom,

a. diaphragm provided with :a peripheral llanfge arranged te dit Within`Said WalflS, an nkjng 4pad adapted te ille strate-hed beneath thediaphlzagn'i with :its edge pentons engaged `between vSaid peripheralflange and the Side walls; nieans te Seenre the eliaphragin and Ain'ialnfname together with their side flanges 'ln clamping relation, Said Sideflanges ,having registering` eerrngaliens which erinip the inking padand Streteh the saine aeress the under surface e1 ,the diaphragm, astencil frame lim-ing similar eerngatien5, and n'ieana for securing theStein cil fname with its eerrngatiens and eorrnlgatiens elf thediaphragm flanges in el:\., inp,ing rea'ltien te a stencil Sheetstretched aia-ees the pad.

in ahand duplicator, the eelnbinatien of a main 1{a1 ne,a diaphragm andan inking,` pad carried thereby, a stencil frame vhaving ja flange withva Surface mating with a ,eogrrespenclinf U aee elt the main fit-naine,means ier l); ,Dang the tive Surfaces tegetiher to ielal'nip a stencilsheet stretched across the pad, and an insert or facing to't yieldalilecmaterial, auch as rubber, 'ifelt er the like, secured ,te ene O thesnr'laeefs le yieldahly held the sheet against Slipping.

14. In a 4hand duplicator, ythe eoialiinatien of a main iframe, adiaphragm, and an ink-- ing ipad Carried thereby, comprising: a felthaell gf, Va :tinely ,weven facing', and a pail therebetween, the threelayers l Stitched together -hy lparallel renne.' of s rtehjing with a.certain ,ernennt el sleek in vthe enter two layers so that the heldermay lie slreiehed aerees ,an OiLtnmrd'ly honed .alertar-,e et thediaiplninopn without forming any wrinklee. ln tel l' neny that elann thel'eregeing as my Own .l have hereto affixed my Signature.

XYILLDU'I POWDER iflASON.

